WG9725230042 HOWO A7 Clutch Booster

The WG9725230042 HOWO A7 Clutch Booster is a key power-assist part for SINOTRUK HOWO A7 heavy-duty trucks (tractor, cargo, dump trucks). It combines hydraulic and air pressure to assist clutch pedal operation, reducing driver's pedal force by 60% for light, smooth clutch engagement/disengagement. This ensures driving comfort during long trips and frequent shifting, while protecting the clutch linkage from excessive wear. We use good materials and precise manufacturing: the cylinder body is high-strength aluminum alloy-lightweight and corrosion-proof. The piston is wear-resistant engineering plastic-smooth-moving and low-friction. The sealing ring is imported nitrile rubber-oil-resistant and high-pressure resistant. The air valve core is high-hardness stainless steel-anti-corrosion and anti-deformation. The installation interface, bolt specs, and pipeline ports fit the original HOWO A7 clutch system (HW series gearbox models) exactly, so it installs with no mods. It handles tough conditions-120℃ under-cab heat, 3-400Hz vibration, and dust/rain erosion-without cylinder deformation, piston jamming, or sealing leaks. Swapping it is easy: no need to adjust clutch linkage or pipelines, just disconnect the old booster's oil/air pipes, take off the bolts, install the new booster per alignment marks, reconnect the pipelines, and test the clutch. Before shipping, we test 'em strict: check air tightness (no leaks at 1.0MPa), hydraulic pressure resistance (no seepage at 15MPa), and durability-so it's reliable. We've supplied to 65+ SINOTRUK after-sales, repair shops, fleets for 11 years-users praise its strong assistance and stable performance.

Product Model: WG9725230042​

Applicable vehicles: SINOTRUK HOWO A7 (4x2/6x4/8x4, original clutch system, matching HW series gearboxes)​

Type: Clutch booster (aluminum alloy cylinder + engineering plastic piston + nitrile rubber seal + stainless steel air valve core)​

Function: Power assistance for clutch operation, reduce pedal force, ensure smooth engagement/disengagement​

Material: Cylinder (high-strength aluminum alloy, anodized); piston (wear-resistant engineering plastic); seal (imported nitrile rubber); air valve core (stainless steel)​

Installation: Direct replacement-fits original clutch interface and bolt specs​

Working conditions: -40℃~120℃; 0.6-1.0MPa air pressure; 8-15MPa hydraulic pressure; ≥60% pedal force reduction; ≥380,000 km life

①Strong power assistance: Dual-power (hydraulic + air pressure) assist structure provides sufficient force, reducing pedal force by 60%-greatly reducing driver fatigue.

② Smooth & linear operation: Precision-machined cylinder wall + low-friction piston ensure stable power transmission, making pedal feel linear (stroke error ≤5mm).

③ Perfect for HOWO A7: Made to HOWO A7's original clutch design-installation interface, bolt spacing, pipeline ports match. No adapters or pipeline mods needed-saves 42% maintenance time vs universal clutch boosters.

④ Durable & reliable: Anodized aluminum alloy cylinder resists rust/corrosion, imported nitrile rubber seal keeps tight. Works stably in harsh conditions-lasts 380k+ km.

This Clutch Booster (Model: WG9725230042) is only for SINOTRUK HOWO A7 heavy-duty trucks-4x2/6x4/8x4 models with original HOWO A7 clutch systems (matching HW series gearboxes). It won't work on other HOWO models (T7H, T5G) or non-SINOTRUK brands (Shaanxi Automobile DeLong, FAW Jiefang). Those have different clutch structures, interfaces, or pressure needs-this clutch booster won't fit or work.

Q1: Works on HOWO T7H trucks?​

A1: No-HOWO T7H has different clutch structure/interface. It causes mismatched installation or insufficient assistance, leading to difficult operation or transmission damage. Get the HOWO T7H-specific clutch booster instead.​

Q2: Clutch pedal too hard/unresponsive after new booster install?​

A2: First check pipelines (no blockage/leakage/wrong connection). If good, check booster installation (no misalignment/jamming). If installed well, check air pressure (0.6-1.0MPa) and hydraulic oil level. Still problematic? Replace the booster (rare defect).​

Q3: How to maintain the clutch booster?​

A3: 1. Check pipes/seals for leaks every 25k km (replace if damaged); 2. Replace clutch hydraulic oil every 60k km/1 year; 3. Clean booster surface often; 4. Inspect piston rod for deformation/wear during maintenance-replace booster if damaged.​

Q4: Need to replace clutch master cylinder with new booster?​

A4: Not mandatory but recommended. New booster works best with well-maintained master cylinder-old ones affect assistance and pedal feel. Inspect and replace if leaking/worn.

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